An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 6645-01-205-3869
NSN 5945-01-227-5647
NSN 5930-00-257-3011
NSN 5990-00-186-2445
NSN 7035-01-479-5268
NSN 6320-00-456-0836
NSN 5835-01-544-5183
NSN 4140-01-131-6608
NSN 5950-01-130-8065
NSN 5999-00-266-3805
NSN 5998-01-606-9560
NSN 5945-01-204-3507